The largest mass shooting in modern history happened in a country with strict gun control. Columbine happened during the AWB. Sweden has more guns per capita than the U.S., but a far lower homicide rate. England banned guns in 1997, they still have gun crime, and now you're much more likely to be stabbed there.

I saw a new article yesterday where in England, some criminals wielding axes and bats rode into a mall on motorcycles and robbed stores. If the English had access to firearms I have no doubt these guys would have had guns, but the lack of guns did nothing to stop this crime.